Within the framework of the preservation of cultural heritage in reinforced concrete, the URBASISMonitoring-Perret experiment aims to monitor the Perret Tower (built in 1924) in Grenoble, the first high-rise building (about 80m) in reinforced concrete. Since its construction, many pathologies linked to its damage have appeared. A rehabilitation project has been launched and in this framework, we wish to develop a research program on multi-instrument operational modal analysis (DAS, velocimeters, inclinometers...) and to search for the signature of the damage using SHM techniques.